Not sure what you mean. Each union is different, each facility has their own contract. If you want updates, go to your union rep and ask that you be included. Get a copy of your facilities contract so that you can read and refer to it. Go to the district union's website and be put on their mailing list. Ask your delegate when they have member meetings, and get involved in those.
Another thought is to see if you can get involved in the negotiating team for the renewal of the contract. Some of the unions will allow members to sit in on negotiations as well.
Most unions welcome input. Hope this helps.